<script setup>
import { addArticleAPI, deleteArticleAPI, listArticleAPI, updateArticleAPI } from '@/api/article';
import { listCategoryAPI } from '@/api/category';
import { Edit, Delete, Plus } from '@element-plus/icons-vue';
import { onMounted, ref } from 'vue';
import { QuillEditor } from '@vueup/vue-quill';
import '@vueup/vue-quill/dist/vue-quill.snow.css';
import { useTokenStore } from '@/stores/token';
import { ElMessage, ElMessageBox } from 'element-plus';

const tokenStore = useTokenStore();

//#region 分类列表
// 分类列表
const categoryList = ref([]);
// 列举分类
const listCategory = async () => {
  categoryList.value = (await listCategoryAPI()).data;
};
//#endregion

//#region 分页搜索
// 用户搜索时选中的分类 id
const categoryId = ref('');
// 用户搜索时选中的发布状态
const state = ref('');
// 总条数
const total = ref(20);
// 当前页
const pageNum = ref(1);
// 每页条数
const pageSize = ref(3);
// 如果每页条数发生变化，调用此函数
const onSizeChange = size => {
  pageSize.value = size;
  listArticle();
};
// 如果当前页码发生变化，调用此函数
const onCurrentChange = num => {
  pageNum.value = num;
  listArticle();
};
//#endregion

//#region 文章列表
// 文章列表
const articleList = ref([]);
// 列举文章
const listArticle = async () => {
  const res = await listArticleAPI({
    pageNum: pageNum.value,
    pageSize: pageSize.value,
    categoryId: categoryId.value || null,
    state: state.value || null
  });
  total.value = res.data.total;
  articleList.value = res.data.items;

  articleList.value.forEach(article => {
    const category = categoryList.value.find(category => category.id === article.categoryId);
    if (category) {
      article.categoryName = category.categoryName;
    }
  });
};
//#endregion

//#region 抽屉
// 抽屉的标题
const title = ref('');
// 是否显示抽屉
const drawerVisible = ref(false);
// 文章表单
const articleForm = ref({
  title: '',
  categoryId: '',
  coverImg: '',
  content: '',
  state: ''
});
// 显示添加文章的抽屉
const showAddDrawer = () => {
  drawerVisible.value = true;
  title.value = '添加文章';
  articleForm.value.title = '';
  articleForm.value.categoryId = '';
  articleForm.value.coverImg = '';
  articleForm.value.content = '';
  articleForm.value.state = '';
};
// 显示编辑文章的抽屉
const showEditDrawer = (row) => {
  drawerVisible.value = true;
  title.value = '编辑文章';
  articleForm.value.title = row.title;
  articleForm.value.categoryId = row.categoryId;
  articleForm.value.coverImg = row.coverImg;
  articleForm.value.content = row.content;
  articleForm.value.state = row.state;
  articleForm.value.id = row.id;
};
// 添加/编辑文章
const confirm = async (state) => {
  articleForm.value.state = state;
  if (title.value === '添加文章') {
    const res = await addArticleAPI(articleForm.value);
    ElMessage.success(res.msg || '添加成功');
  } else {
    const res = await updateArticleAPI(articleForm.value);
    ElMessage.success(res.msg || '编辑成功');
  }
  drawerVisible.value = false;
  listArticle();
};
// 删除文章
const deleteArticle = (row) => {
  ElMessageBox.confirm('你确认要删除该文章吗?', '温馨提示', {
    confirmButtonText: '确认',
    cancelButtonText: '取消',
    type: 'warning'
  }).then(async () => {
    const res = await deleteArticleAPI(row.id);
    ElMessage.success(res.msg || '删除成功');
    listArticle();
  }).catch(() => {
    ElMessage.info('取消删除');
  });
};
//#endregion

// 文章封面上传成功的回调函数
const uploadSuccess = res => {
  articleForm.value.coverImg = res.data;
  console.log(res.data);
};

onMounted(() => {
  listCategory();
  listArticle();
});
</script>

<template>
  <el-card class="page-container">
    <template #header>
      <div class="header">
        <span>文章管理</span>
        <div class="extra">
          <el-button type="primary" @click="showAddDrawer">添加文章</el-button>
        </div>
      </div>
    </template>

    <!-- 搜索表单 -->
    <el-form inline>
      <el-form-item label="文章分类：">
        <el-select placeholder="请选择" v-model="categoryId" style="width: 240px">
          <el-option v-for="c in categoryList" :key="c.id" :label="c.categoryName" :value="c.id">
          </el-option>
        </el-select>
      </el-form-item>
      <el-form-item label="发布状态：">
        <el-select placeholder="请选择" v-model="state" style="width: 240px">
          <el-option label="已发布" value="已发布"></el-option>
          <el-option label="草稿" value="草稿"></el-option>
        </el-select>
      </el-form-item>
      <el-form-item>
        <el-button type="primary" @click="listArticle">搜索</el-button>
        <el-button @click="categoryId = ''; state = ''">重置</el-button>
      </el-form-item>
    </el-form>

    <!-- 文章列表 -->
    <el-table :data="articleList" style="width: 100%">
      <el-table-column label="文章标题" width="400" prop="title"></el-table-column>
      <el-table-column label="分类" prop="categoryName"></el-table-column>
      <el-table-column label="发表时间" prop="createTime"> </el-table-column>
      <el-table-column label="状态" prop="state"></el-table-column>
      <el-table-column label="操作" width="100">
        <template #default="{ row }">
          <el-button :icon="Edit" circle plain type="primary" @click="showEditDrawer(row)"></el-button>
          <el-button :icon="Delete" circle plain type="danger" @click="deleteArticle(row)"></el-button>
        </template>
      </el-table-column>
      <template #empty>
        <el-empty description="没有数据" />
      </template>
    </el-table>

    <!-- 分页条 -->
    <el-pagination v-model:current-page="pageNum" v-model:page-size="pageSize" :page-sizes="[3, 5, 10, 15]"
      layout="jumper, total, sizes, prev, pager, next" background :total="total" @size-change="onSizeChange"
      @current-change="onCurrentChange" style="margin-top: 20px; justify-content: flex-end" />

    <!-- 抽屉 -->
    <el-drawer v-model="drawerVisible" :title="title" direction="rtl" size="50%">
      <!-- 添加文章表单 -->
      <el-form :model="articleForm" label-width="100px">
        <el-form-item label="文章标题">
          <el-input v-model="articleForm.title" placeholder="请输入标题"></el-input>
        </el-form-item>
        <el-form-item label="文章分类">
          <el-select placeholder="请选择" v-model="articleForm.categoryId">
            <el-option v-for="c in categoryList" :key="c.id" :label="c.categoryName" :value="c.id"></el-option>
          </el-select>
        </el-form-item>
        <el-form-item label="文章封面">
          <el-upload class="avatar-uploader" :auto-upload="true" :show-file-list="false" action="/api/file/upload"
            name="file" :headers="{ 'Authorization': tokenStore.token }" :on-success="uploadSuccess">
            <img v-if="articleForm.coverImg" :src="articleForm.coverImg" class="avatar" />
            <el-icon v-else class="avatar-uploader-icon">
              <Plus />
            </el-icon>
          </el-upload>
        </el-form-item>
        <el-form-item label="文章内容">
          <div class="editor">
            <quill-editor theme="snow" v-model:content="articleForm.content" contentType="html" />
          </div>
        </el-form-item>
        <el-form-item>
          <el-button type="primary" @click="confirm('已发布')">发布</el-button>
          <el-button type="info" @click="confirm('草稿')">草稿</el-button>
        </el-form-item>
      </el-form>
    </el-drawer>
  </el-card>
</template>

<style lang="scss" scoped>
.page-container {
  min-height: 100%;
  box-sizing: border-box;

  .header {
    display: flex;
    align-items: center;
    justify-content: space-between;
  }
}

/* 抽屉样式 */
.avatar-uploader {
  :deep() {
    .avatar {
      width: 178px;
      height: 178px;
      display: block;
    }

    .el-upload {
      border: 1px dashed var(--el-border-color);
      border-radius: 6px;
      cursor: pointer;
      position: relative;
      overflow: hidden;
      transition: var(--el-transition-duration-fast);
    }

    .el-upload:hover {
      border-color: var(--el-color-primary);
    }

    .el-icon.avatar-uploader-icon {
      font-size: 28px;
      color: #8c939d;
      width: 178px;
      height: 178px;
      text-align: center;
    }
  }
}

.editor {
  width: 100%;

  :deep(.ql-editor) {
    min-height: 200px;
  }
}
</style>
